Class 10 > PYQ SCIENCE > 2019 > SET A

2019

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Q1
What is the function of a galvanometer in a circuit?

Q2
Why is biogas considered an excellent fuel?

Q3
How it can be proved that the basic structure of the Modern Periodic Table is based on electronic configuration of atoms of different elements?

Q4
The electronic configuration of an element is 2, 8, 4. State its:
(a) group and period in the Modern Periodic Table
(b) name and write its one physical property.

Q5
Write two different ways in which glucose is oxidized to provide energy in human body. Write the products formed in each case.

Q6
Define the term power of accomodation. Write the modification in the curvature of the eye lens which enables us to see the nearby objects clearly?

Q7
2g of silver chloride is taken in a china dish and the china dish is placed in sunlight for sometime. What will be your observation in this case? Write the chemical reaction involved in the form of a balanced chemical equation. Identify the type of chemical reaction.

Q10
Identify the acid and the base from which sodium chloride is obtained. Which type of salt is it? When is it called rock salt? How is rock salt formed?

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